minor #3581 Add missing hyphen in HTTP Fundamentals page (ockcyp)

This PR was merged into the 2.3 branch.

Discussion
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Add missing hyphen in HTTP Fundamentals page

In HTTP Fundamentals page all Symfony Components have hyphen after component name except for Translation component.

Commits
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8feb85d Add missing hyphen in HTTP Fundamentals page

book/http_fundamentals.rst

@@ -538,7 +538,7 @@ regardless of how your project is developed. To name a few:
 * `Security`_ - A powerful library for handling all types of security inside
   an application;
 
-* `Translation`_ A framework for translating strings in your application.
+* `Translation`_ - A framework for translating strings in your application.
 
 Each and every one of these components is decoupled and can be used in *any*
 PHP project, regardless of whether or not you use the Symfony2 framework.